It actually syncs with the notes personal journal. To create one go to workspace file-->database-->new give it a title and pick the journal template.
Then all you need to do is go into your inbox and go to Actions-->synchronize journal.

Ahh, but if you want wireless sync, and to make life a lot easier, I'd highly recommend getting roaming setup properly in Notes, and then set the PIM sync stuff to use the server based replicas of your journal and address book.

And, if you decide to go the roaming route, you may want to read this on the IBM/Notes forum.